00290nam a2200109Ia 4500082002500000100002800025245005900053260004800112300001000160500000500170700000500175  a519.5330212bD249.NC  aDavid, F. N. and Others  aNormal centroids medians and scores for ordinal datab  aCambridgebCambridge University Pressc1968  a201p.  a  a